On an Abnormal Specimen of Antedon rosacea. 195 
but as I have not seen Liochoria Huttoni, I cannot state 
whether the sternal structure differs from that of the species 
I now locate in the same genus. These five species evidently 
form one natural group. 
CYTILISSUS, gen. nov. 
Facies resembling the setose species of Morychus. An- 
fenne short, first joint large, cylindric, second quite half the 
length of the first, narrowed apically, third elongate and 
slender, fourth slender, shorter than third, fifth broader, sub- 
guadrate club elongate, oblong, about as "long as joints 3 to 
5 taken tovether , compact, very indistinctly articulated, bat, 
so far as I can see, composed of two nearly equal joints. 
The antenna, therefore, seem to have but seven joints, a 
‘character which of itself is sufficient in this group for generic 
separation. 
Cytilissus claviger, sp. n. 
Convex, broadly oval or subrotundate; with numerous 
erect, elongate, slender, cinereous sete or hairs; piceous, 
slightly shining, the tibiee and first joint of the antenna red, 
tarsi and palpi “yellow. 
Head finely and distantly punctured. yes distinctly 
faceted. Thorax strongly transverse, narrowed anteriorly, 
sides straight, base and apex truncate, its angles acute ; its 
surface very finely but not closely punctured. Scutellum 
invisible. lytra distantly and very finely punctured. Legs 
with fine sete ; anterior tibie grooved along the outside, the 
middle pair only a little curved externally. Tars¢ moderate, 
the third joint with a thin well-developed membranous appen- 
dage. Polpi thick, obtuse at the extremity. 
Underside pitchy, punctate, with pale longish hairs. 
Length 14, breadth 3 line. 
Mount Pirongia. 1 regret having been unable to find 
more than one of this interesting species. 
[To be continued. | 
XXIX.— On an Abnormal Specimen of Antedon rosacea. By 
HERBERT C. CHADWICK (from the Zoological pores 
of the Owens College). 
[Plate VIIL.] 
THREE months ago, while selecting specimens of Antedon 
rosacea for serial section-cutting from a number which had 
15* 
